Lac Du Vieux Émosson

Lac du Vieux Émosson: Visiting Hours, Tickets, and Guide to Finhaut Historical Sites

Date: 04/07/2025

Introduction

Lac du Vieux Émosson, perched at over 2,200 meters in the Swiss Alps near Finhaut in the canton of Valais, is a unique destination blending spectacular alpine scenery, remarkable engineering, and deep historical and geological significance. This high-altitude reservoir, created by the Vieux Émosson dam, is not only a feat of hydropower innovation but also a treasure trove for hikers, history buffs, and families alike.

This detailed guide provides up-to-date information on visiting hours and ticketing, outlines the main hiking trails and natural attractions (including the famous dinosaur footprints), and offers practical travel tips and accessibility advice. Whether your interest is renewable energy, alpine adventure, or the region’s unique paleontological heritage, Lac du Vieux Émosson promises a memorable Swiss Alps experience.

Overview and Historical Background
Development of Hydropower and the Vieux Émosson Dam
Nant de Drance Project: Modernization and Engineering Highlights
Cross-Border Collaboration and Regional Impact
Visitor Information: Hours, Tickets, and Accessibility
Hiking Trails and Nearby Attractions
Geological and Paleontological Features
Practical Tips and Facilities
FAQ
Conclusion and Call to Action
Visuals and Media Suggestions
References and Official Sources

Overview and Historical Background

Lac du Vieux Émosson lies within the municipality of Finhaut, Valais, at around 2,205 meters above sea level. The original Vieux Émosson arch dam was constructed in the 1950s to capture the hydropower potential of the Nant de Drance valley (Emosson History). In the 21st century, it was raised to serve as the upper reservoir for the Nant de Drance pumped-storage facility—one of the most advanced in Europe—further cementing its role in sustainable energy production (Wikipedia: Nant de Drance Hydropower Plant; Swissinfo).

The lake’s surroundings feature dramatic peaks, glacial valleys, and a rare site of fossilized Triassic-era dinosaur footprints, making it a destination of both engineering marvel and geological intrigue. Its cross-border hydrological system, shared with France, underlines the collaborative spirit in Valais’s approach to renewable energy and environmental stewardship.

Development of Hydropower and the Vieux Émosson Dam

Early Hydropower Initiatives

The region’s hydropower story began with the Barberine facility in the 1920s, built to supply electricity to the Swiss Federal Railways. As demand grew, plans emerged for a larger, higher-altitude reservoir. The Vieux Émosson dam was conceived in 1952 and completed in 1955, creating a reservoir initially holding 13.8 million cubic meters of water (Emosson History; Wikipedia: Nant de Drance Hydropower Plant). The project also marked a significant Swiss-French collaboration, with Electricité de France joining as a partner in 1955.

Modernization: The Nant de Drance Project

To support increased renewable energy storage, the dam was raised by 20 meters from 2012–2016, boosting the reservoir’s capacity to 25 million cubic meters and its surface area to 55 hectares. The Nant de Drance pumped-storage plant now connects Lac du Vieux Émosson (upper reservoir) and Lac d’Émosson (lower reservoir) in a closed-loop system capable of storing and generating up to 900 MW of power—meeting nearly 3% of Switzerland’s energy needs (Swissinfo).

Engineering Feats

The Nant de Drance facility required the excavation of 18 kilometers of tunnels and the construction of a vast underground powerhouse. The pumped-storage cycle allows water to be moved uphill using surplus electricity, then released to generate power during peak demand, achieving an efficiency of over 80% (Wikipedia: Nant de Drance Hydropower Plant). The project received the 2014 Major Tunnelling Project of the Year award.

Cross-Border Collaboration and Regional Impact

Lac du Vieux Émosson sits at the crossroads of Swiss and French watersheds, with the hydroelectric complex straddling the border. Together with the larger downstream Émosson dam, the system supplies significant electricity while preserving the region’s natural beauty (Emosson History; Vallée du Trient Tourisme).

Visitor Information: Hours, Tickets, and Accessibility

Visiting Hours

Open Season: Late spring to early autumn (typically June–September).
Hours: Main facilities and trails are usually accessible from 9:00 AM to 6:00 PM. The mountain hut and restaurants may have separate hours—always check ahead (VerticAlp Emosson Railway).

Tickets

Funicular and Train: Tickets are required for the VerticAlp Emosson funicular and panoramic railway; purchase online or at the station. Combination tickets are available.
Hiking Trails: Free access; no ticket required for hiking routes or the dinosaur footprints site.

Accessibility

Public Transport: Trains to Finhaut or Le Châtelard, then the VerticAlp system.
Car: Parking at the dam (road access from Finhaut or Chamonix; check seasonal conditions).
Mobility: Funicular and train are accessible to most visitors; some trails and fossil sites require moderate fitness and are not fully wheelchair accessible.

Hiking Trails and Nearby Attractions

Main Routes

Emosson Dam – Lac du Vieux Émosson – Dinosaur Footprints Loop: 12.5 km, 760 m ascent, easy to moderate (Swiss Mountain Fun).
Tour du Lac du Vieux Émosson: 9–12 km, with panoramic views of Mont Blanc (Komoot).
Extensions: Options to Lac Vert, Col de la Terrasse, or longer alpine circuits.

Attractions

Dinosaur Footprints: Accessible via a marked trail, best visited after mid-July when snow has melted (Valais.ch).
Panoramic Views: The lake offers breathtaking vistas of the Mont Blanc massif and neighboring peaks.
Cultural Sites: Explore Valais historical towns and local summer events (Vallée du Trient).

Geological and Paleontological Features

Lac du Vieux Émosson is renowned for its Triassic-period fossil site. The well-preserved footprints provide a glimpse into prehistoric life and are accompanied by informative panels. Geology-themed guided walks are often available in summer (Valais.ch; Swiss Mountain Fun).

Practical Tips and Facilities

Packing: Sturdy boots, layered clothing, rain gear, sun protection, and sufficient water/snacks are essential.
Dining: Restaurant du Barrage d’Émosson and Cabane du Vieux-Émosson offer meals and lodging (Restaurant du Barrage d’Émosson; Cabane du Vieux-Emosson).
Restrooms: Available at the dam and mountain hut; remote trails require self-sufficiency.
Safety: Weather can change rapidly; check forecasts, stay on marked trails, and respect wildlife.

Frequently Asked Questions (FAQ)

Q: What are the visiting hours for Lac du Vieux Émosson?
A: Generally, 9:00 AM to 6:00 PM during the summer season. Always check the official site for current hours.

Q: Are tickets required to visit the lake?
A: Hiking trails and the fossil site are free; funicular and train rides require tickets.

Q: Is the destination suitable for families?
A: Yes, particularly when using the VerticAlp Emosson railway and easy trails.

Q: When is the best time to see the dinosaur footprints?
A: After mid-July, when snow has melted at higher elevations.

Q: Are dogs allowed?
A: Yes, on a leash.

Conclusion and Call to Action

Lac du Vieux Émosson exemplifies the harmony of nature, history, and innovation—offering visitors a chance to explore awe-inspiring landscapes, marvel at renewable energy engineering, and discover ancient dinosaur footprints. Plan your visit between late June and early October for the best experience. Secure your transport tickets in advance, pack appropriately for alpine conditions, and make time to enjoy both the natural and cultural wonders of the Valais region.

For real-time updates, guided tours, and interactive maps, download the Audiala app. Follow us on social media for the latest news, travel tips, and event announcements. Your adventure at Lac du Vieux Émosson awaits!

Visuals and Media Suggestions

Photos: Panoramic shots of Lac du Vieux Émosson with the Mont Blanc massif (alt: “Panoramic view of Lac du Vieux Émosson and Mont Blanc”).
Trail Maps: Highlighting main hiking circuits and the dinosaur footprint site.
Videos: Aerial footage of the dam, funicular ride, and fossil exploration.